Building construction.



P. M. STEWART.

BUILDING CONSTRUCTION.

APPLICATION FILED NOV. 5, 1912.

Patented July 29, 1913.

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or member of heat insulating PEREZ M. STEWART, OF NEW YORK, N. Y.

BUILDING CONSTRUCTION.

Specification of Letters Patent.

Patented July 29, 1913.

Application filed November 5, 1912. Serial No. 729,575.

To all whom it may concern:

Be it known that I, PEREZ M. STEWART, a citizen of the United States, and a resident of the borough of Manhattan, in the city, county, and State of New York, have invented an Improvement in Building Construction, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to a concrete build ing constuction and is herein shown as embodied in a roof construction for such buildings, which is especially applicable to concrete buildings employed for refrigerating purposes, silk mills, and paper and pulp mills, wherein it is desired to obtain a maximum heat insulation.

The present invention has for its object to increase the insulation of buildings of the character specified at a minimum eX- pense. To this end, the concrete roof is provided with a layer or member of concrete, which is supported by a sheet or member of corrugated material, and between these two members is interposed a suitable material for insulating the concrete from the whole or a part of the corrugated sheet.

A mixture of gypsum and cork or other non-metallic dust, which is a poor conductor of heat and cold, forms a good insulating material, which may be used in plastic form to fill the valleys on the upper surface of the corrugated sheet or member. The valleys formed on the under surface of the corrugated sheet may be covered by a layer material, such as a sheet of asbestos paper, cork board or the like, to form a series of air spaces which add to the heat insulating properties of the building. While plain corrugated material may be used with good results, it is preferred. to employ corrugated asbestos protected metal.

The particular features of this invention will be pointed out in the claims at the end of this specification.

The drawing represents in section a sufficient portion of a building construction embodying this invention to enable it to be understood.

In the drawing is represented a preferred construction, which includes a corrugated sheet member a, forming valleys b on its upper side and valleys c on its lower side. The members a are suitably supported by concrete beams (Z and may have their valleys Z) filled with a good insulator of heat and cold 6, such as a mixture of gypsum and cork or other non-metallic dust. Above the corrugated sheet member a is located the layer or member f of concrete, which, in the con struction shown in Fig. 1, rests on the insulator e and on the portions of the corrugated sheet between the valleys b. The corrugated member may have secured to its lower side a layer, sheet or member 5/, which may be cork board, asbestos paper or like heat insulating material, which closes the mouths of the valleys 0 and forms air spaces 2' thereof. The concrete beams (Z may be enveloped by sheet metal 7i and by the cork board 9.

By reference to the drawing, it will be seen that the concrete layer or member f which, in itself is a poor insulator of heat and cold, is highly insulated against eX- ternal heat and cold by the insulating material e which fills the valleys b of the corrugated member a and by the air spaces 2' formed by the layer or member 9 closingthe valleys c of said corrugated sheet. Furthermore the insulation obtained by the air spaces 2' and the material 6 filling the valleys 6, enables a very thin cork board to be used, which enables the desired insulation to be obtained at a minimum expense. It is also preferred to use corrugated asbestos protected metal for the corrugated member, as by so doing, there is obtained the benefit of the sheets of asbestos and the asphalt with which they are cemented to the opposite surfaces of the metal sheet, but it is not desired to limit the invent-ion in this respect as good results are obtained with plain corrugated sheets of metal or nonmetallic material.

It will be understood that the various layers or members are secured together in any suitable manner, and as the method of fastening the parts together does not form any part of the invent-ion no specific method is shown or deemed necessary to a proper understanding of the invention. From the above description, it will be seen that a highly insulated and non-condens ing concrete building construction is obtained, which is especially applicable as a roof structure for buildings used for cold storage, silk mills, paper and pulp mills and like buildings, but which may also be used as a wall or floor construction.

Claims. v I

1. A concrete construction for buildings embodying a corrugated sheet, a mixture of gypsum and non-metallic dust located in the valleys 011 the upper surface of said corrugated sheet, a concrete member above the corrugated sheet, and a layer of cork board covering the valleys on the under side of said corrugated sheet to form air spaces, substantially as described.

2. A concrete construction for buildings embodying a corrugated member, heat in sulating material located in the valleys on the upper surface of said corrugated member, a concrete member above the corrugated member, and a layer of heat insulating material covering the valleys on the under side of said corrugated member to form air spaces, substantially as described.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing Witnesses.

PEREZ M. STEVART.

Witnesses:

LILLIAN E. WENTZ, WALTER R. HERRIGK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

